Cryogenic deburring machine for Plastic Components

General Introduction of Low Temperature Deflashing

Cryogenic deflashing and deburring is a process that employs cryogenic temperatures to remove flash on manufactured workpieces made of a wide range of rubber and plastic (and other materials) both thermoset and thermoplastic. Some examples of materials used include nylon, Tefzel®, HD-PE, PPS, PET, polycarbonate, polypropylene, polyurethane, liquid crystal polymer, ABS, Peek and Acetal. Manufactured parts that have been successfully deburred include those made through injection molding, compression molding and extrusion molding.

What is “Flash or Burr.”

“Flash” is a raised edge attached to the workpiece. It is an unwanted piece of material and requires removal. Many medical devices and other precision components are included in deflashing applications. Deburring accounts for a significant amount of the costs of manufacturing. The cryogenic deflashing process causes the flash or burr to become stiff or brittle and break away leaving a clean edge. There are three types of burrs that can be formed in manufacturing operations and can be classified by the physical manner of formation: Poisson burr, roll-over burr and Tear burr.

■Poisson Burr

A Poisson burr results from the tendency of a material to bulge at the side when compressed until permanent deformation of the plastic occurs.

■Roll-over Burr

A roll-over burr is a burr that is more of a chip that is bent rather that sheared. The resulting burr is usually comparatively larger. The process even removes recessed burrs in blind and through holes.

■Tear Burr

A Tear burr is the result of material tearing from a work piece rather than shearing from it.

Cryogenic Deflashing and Its Specifications

In the cryogenic deflashing process, parts are loaded into a basket. A cryogem such as liquid nitrogen is used to cool the workpieces. After they are cooled they are tumbled with pellets- often a polycarbonate media ranging in size from 0.15mm to 2.03 mm. Sometimes cryogenic deflashing does not rely on a blasting action but rather on the tumbling of the parts to remove flash from the outer edges. The process can even remove recessed burrs in blind and through holes. The process does not affect the surface finish or the geometry of the part. Edges are maintained without rounding or removal of extra material and only the unwanted burrs are removed.

Cryogenic Deflashing Advantages

Cryogenic deflashing provides advantages over manual deflashing.

■The process maintains part integrity and critical tolerances. As it is a bath process the price per piece is far less as many more parts can be processed at the same time.

■Cryogenic flashing is non-abrasive.

■As the process is computer controlled, the human operator variable is removed from the process.

■Mold life is extended by the cryogenic deflashing process. Instead of making a new mold a company may choose to deburr a manufactured part cryogenically and achieve the same product quality very much as they would with a new mold for a period of time until maintenance is performed.

Pege’s Automatic Nitrogen Trimming Machine’s Features

 ■Greater productivity

■Large output in short time

■Better and consistent Finish

■Low Labour dependence

■Space Saving

■Low Media Consumption

■Wide variety of rubber compounds - NR to Silicon Rubber

■Low Nitrogen Usage

■Simple Electrical Controls

■High Efficiency Blast Wheel

■Safety Interlocks

■Simple and Very Low maintenance

Our factory and Workshop

Nanjing Pege Techno Machine Co.,Ltd production plant is located in the No.9 Ankang road, Guli Industrial Zone, Jiangning District, Nanjing.
We have professional production workers and process, are determine to produce best product for the customer all over the world

Packing and Transportation

The machine produced by Nanjing Pege is well packed by plywood carton suitable for long distance sea transportation to ensure machine safety and performance.

We can help customer to arrange the transportation by the terms of FOB, CIF with land or sea transportation methods according to the request from the customer.

FAQs on cryogenic deflashing machine

1.     Can you give a brief company profile of Nanjing Pege Techno Co., Ltd

NANJING PEGE TECHNO MACHINE CO., LTD is a leading quality and customer-oriented manufacturer and supplier who is specialized in providing rubber and plastic industry machines. Rubber sector machines focus on deburring and cutting include cryogenic de-flashing machine, spin trim de-flashing machine as well as rubber strip or gasket cutting machine. Plastic sector machines focus on material precision feeding include the Gravimetric Loss-in-weight feeders and its affiliated system including uploading and supplementary system

Cryogenic Deflashing Machine aims at realizing faster quality production cycle with least rejection on those parts including rubber molded, plastic injection molded and die-casting components' flashes removal process. 

2.     How does cryogenic de-burring process work?

Cryogenic deflashing is a process for removing flash from molded rubber parts. We use liquid nitrogen, high-speed rotation and shot blasted plastic media in varying combinations to remove the flash in a highly precise, economical and expedient manner.

Parts that have thin flash can be quickly and thoroughly cryogenically deflashed. This process is exceptionally good at removing the inner dimensional and complex flash that cannot be removed by any other method.

3.     What is main composition of a cryogenic deflashing machine?

A typical cryogenic deflashing machine consists of a stainless-steel cabinet insulated with dense polyurethane foam. Located inside the cabinet are the blast motor, the liquid nitrogen nozzle, and the opening for the throw wheel. Under the chamber there is a vibrator for separation. And electrical controls including inverter, PLC, relays to control the blasting motor and gear motor. Besides, a barrel with a gear box to swing or tumbling is also important for nitrogen deflashing.